Stereoscope.



No. 665,6"). Patented. Jan. 8, l90l. W. H. LEIGH.

STEREOSGOPE.

(Application flied June 2, 1900.) (No Model.) 2 Sheets-Sheet I.

P'atent ed m. 8,- mm.

- w. H. LEIGH. STEBEOSCUPE.

(Application filed June 2, 1900.1

2 Sheets-sheet 2.

WITNESSES: Z

By @MM Y lVILLlAM HARVEY LEIGH, OF

FFICE.

' ATENT MEADVILLE, PENNSYLVANIA.

STEREOSCOPE.

SPECIFICATION formingpart of Letters Patent N 0. 665,610, dated January8, 1901.

Application filed June 2, 1900.

To aZZ whont it may concern:

Be it known that 1, WILLIAM HARVEY LEIGH, a citizen of the UnitedStates, residing at Meadville, in the county of Crawford and State ofPennsylvania, have invented certain new and useful Improvements inStereosoopes; and I do hereby declare the following to bea full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

This invention relates to certain new and .useful improvements inportable stereoscopes; andit has for its objects,among others, toprovide an improved device of this class which shall be light, strong,and durable and in which the light will be excluded from the hood, whichlatter is provided with bridgepieces or coils and having means forcontrolling the movements of the view-slide and preventing its wabblingfrom side to side.

The stereoscope is made throughout of aluminium frosted or providedwitha satin finish to prevent any reflection, and the shaft andlens-frame are formed of a single piece which embodies great strengthwith lightness. The hood and its coils also I form of a single piece, soshaped that it fits the face and excludes thelight from the interior ofthe hood, thus making the view through the lenses very brilliant. Theview-slide is so constructed and adjusted to the shaft as to slidethereon freely without wabbling laterally, and a novel form of springholding device is provided for holding the slide in its adjustedposition and serving to prevent the lateral movement above mentioned.The lenses are held in position between the lens-frame and a plate,which latter serves to stop the light from going through into the hoodbetween the same and the lensframe.

Other objects and advantages of the invention will hereinafter appearand the novel features thereof will be specifically defined by theappended claims.

The invention is clearly illustrated in the accompanying drawings,which, with the letters of reference marked thereon, form a part of thisspecification, and in which Figure 1 is a side elevation of my improvedstereoscope. Fig. 2 is a substantially central vertical longitudinalsection through the same. Fig. 3 is a bottom plan. Fig. 4 is an end viewlooking into the hood. Fig. 5 is a View looking at the opposite end.Fig. 6 is a vertical cross-section through the view-slide with otherparts removed, showinga modified form.

Like letters of reference indicate like parts throughout the severalviews.

Referring now to the details of the drawings by letter, A designates theshaft, and B the lens-frame. They are formed of one and the same piecestamped or otherwise shaped to the required form and preferably ofaluminium, which is frosted to prevent any refiection which would tendto destroy the efficiency of the scope.

O is the hood. It is likewise formed of a single piece of metal,preferably aluminium, so shaped as to fit the face, and formed integraltherewith are the coils or bridge-pieces D, which are of the shape shownbest in Fig. 4, being sprung into place and bearing on the outer face ofthe lens-frame and against each other, where they are securely held byfriction and require no other fastening means. The edge of the hood, aswell as the edge of these coils, may, if desired, be covered with somesoft material, as velvet or the like, as seen at E. The hood is securedto the lensframe in any suitable manner.

F represents the lenses. They are secured in position by the plate orpiece G, also of aluminium and between which and the lensframe thelenses are retained. This plate or piece G ispreferably secured in placeby screws, as seen in Fig. 5, so that it may be readily removed to allowaccess to the lenses when required.

The shaft A is preferably of the shape in cross-section seen in Figs. 5and 6, being provided longitudinally with the central elevation wand therecess a on its under side, which serves to strengthen the shaft andfurther serves as a means for guiding and preventing side-to-sidemovement of the viewslide, as will be readily understood.

H is a partition secured to the upper face of the shaft centrallybetween the lenses and secured further,if necessary,to the plate G. Itis made of frosted aluminium and prevents confusion when looking throughthe lenses at the views. It may be braced at its outer end by thevertical piece I, to which it is secured and which is also by preferenceof frosted aluminium.

J is the View-slide. It is provided at the ends with the yielding curvedportions lwhich are bifurcated at their upper ends, and the sideportions of the bifurcations coiled or curved, as shown, to form elasticholders for the views. This slide is formed of aluminium and is providedcentrally with the aperture K, which is of a shape corresponding to thecross-section of the shaft, having the central recess to receive the ribor elevation of the shaft, which serves to prevent wabbling of the slidein its movements along the shaft or when in its fixed position. Theupper face of the slide is provided with the groove or detween the freeends of which isarranged the. spring 0, while their other ends carry thejaws P, which are designed to grasp and en-? gage the opposite edges ofthe shaft A, as seen The slide is preferably clearly in Fig. 6. formedwith an upwardly-extending lugj to enter the groove at on the under sideof the;

shaft to aid in steadying the slide in its movements.

Q is the handle, which may be of any de-' sired form and attached to theshaft by a hinge or pivot of any well-known or preferredv f0rm,'so thehandle may be moved to any angle desired or folded against the underside of the shaft for packing or storage purposes.

From the foregoing it will be seen that I have devised a novel, strong,and attractive stereoscope; but while the structural embodiment hereinillustrated and described is believed at this time to be preferable I donot desire to limit myself thereto, but reserve the right to effect suchchanges, modifications, and variations as may come properly within thescope of the protection prayed.

The portionsj may be in one piece with the slide, as seen in Fig. 5, orseparate therefrom, as in Fig. 6.

What I claim as new is 1. In a stereoscope a lens-frame having a hood ofaluminium with coils frictionally held within the hood with the adjacentportions of 3. In a stereoscope a shaft with lens-frame and hood, and aslide movable along the shaft and means pivoted on the slide to engagethe edges of the shaft for preventing lateral movement of said slide.

4. In a stereoscope a shaft with a longitudinal rib, and a view-slidemovable along the shaft and having a recess to receive said rib.

5. In a stereoscope a shaft having a rib and a longitudinal groove, anda view-slide having a groove to receive said rib and a lug to engagesaid groove.

6. In astereoscope,a shaft,a view-slide movable therealong, andspring-controlled devices pivoted on the said slide for engaging theopposite edges of the shaft.

7. In a stereoscope, a shaft and lens-frame formed integral, with theframe at substantially right angles to the shaft, a hood secured to thelens-frame, and 'coils integral with the hood and sprung into positionand bearing on the outer face of the lens-frame and against each other,as set forth.

8. Ina stereoscope, a shaft and'lens-frame formed integral, with theframe at substantially right angles to the shaft, a hood secured to thelens-frame and coils integral with the hood and sprung into position andbearing on the outer-face of the lens-frame and against each other andheld solely byfrictional contact of their adjacent curved portions, asset forth.

9. An aluminium stereoscope consisting of a shaft and a lens-frame in asingle piece of aluminium, an aluminium hood secured to the lens-frameand having formed integral therewith coils or bridge-pieces bearing onthe outer face of the lens-frame and against each other and frictionallyheld, a lens-securing plate of aluminium, a partition on the shaftbetween the lenses and secured to said plate, and a view-slide ofaluminium adjustable on the shaft, all substantially as shown anddescribed.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM HARVEY LEIGH.

Witnesses:

JAS. J. PALMER, J. A. SPITLER.

